Qualidade da água de irrigação de poços tubulares e do rio gorutuba na região de Janaúba-MG.

Abstract

This work aimed to study the irrigation water quality from wells and from Gorutuba River used in 24 banana farms nearby Janauba, Minas Gerais State, Brazil. Water chemical characterization included electric conductivity, pH, concentrations of Ca2+, Mg2+, Na+, K+, Sio, CO3²-, HCO3-, Cl- and Fe. Well and river waters differed chemically, with the former presenting higher electric conductivity and SAR average values, as well as higher Ca2+, Mg2+, Na+, HCO3-, Cl- and Sio contents. Well waters were considered of medium salinity risk and low sodicity risk and the high bicarbonate contents were close to restriction values for irrigation use. The river waters were classified as low salinity risk and severe sodicity risk.